Archimedes number

From Freepedia

An Archimedes number, named after the ancient Greek scientist Archimedes, to determine the motion of fluids due to density differences, is a dimensionless number in the form:

<math>{\rm Ar} = \frac{g L^3 \rho_\ell (\rho - \rho_\ell)}{\mu^2}</math>

where:

• g = gravitational acceleration (9.81 m/s²),
• ρ_l = density of the fluid,
• ρ = density of the body,
• μ = fluid absolute viscosity.

See also

• Fluid dynamics
• π (also known as Archimedes' constant)